Today, knowing your gems, being absolutely sure about what you are buying and selling is essential. Major changes in the gem world - new synthetic stones, new treatments to enchance and conceal, new gems and more stones available in every hue and tone of colour - make accurate gem identification more important than ever to both buyers and sellers. family-run business, someone who enjoys collecting or acquiring gems for personal pleasure, or a seriouos investor, insufficient knowledge can be costly. It can result in a bad purchase, damage to a reputation, and equally significant, failure to...